//C07:7.1:colddays.c
#include <stdio.h>

int main(void)
{
    const int FREEZING = 0;
    float temperature;
    int cold_days = 0;
    int all_days = 0;

    printf("Enter the list of daily low temperatures.\n");
    printf("Use Celsius, and enter q to quit.\n");

    while (scanf("%f", &temperature) == 1)
    {
        all_days++;
        if(temperature < FREEZING)
        {
            cold_days++;
        }
    }

    if(all_days != 0)
    {
        printf("%d days total: %.lf%% were bellow freezing.\n",
            all_days, 100.0 * (float)cold_days / all_days);
    }

    if(all_days == 0)
    {
        printf("No data entered!\n");
    }
}